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The permanent magnets made from rare earth elements that have high magnetic energy are always called powerful magnets. Due to the highest magnetic energy product, neodymium magnet is the most powerful permanent magnet in commercial terms, it plays important role in modern industry. Available Surface Treatment for the Powerful Neodymium Magnets Although the most powerful neodymium magnets have excellent magnetic properties, they are easy to corrode, so surface protection coating is very necessary, Here is the available surface treatment for neodymium powerful magnets, and details of each kind of coating.